When you hear the word hydrotalcite, everyone will wonder, what is this thing and what does it do? Let me tell you, hydrotalcite is a supramolecular material. Many people will understand at this time that hydrotalcite is used for chemical reactions. That’s right, hydrotalcite is combined with other chemicals to undergo chemical reactions to achieve the desired effects, such as lowering temperatures, preventing the burning of flammable substances, and changing the properties of other substances.
What is hydrotalcite? What are its uses in various fields? The main applications of hydrotalcite:
1. Hydrotalcite has a structure and composition similar to magnesium hydroxide and aluminum hydroxide. When it is heated to decompose, it releases a large amount of water and carbon dioxide, and absorbs a large amount of The heat can reduce the temperature of the combustion system; the algae vapor and carbon dioxide gas released by decomposition can dilute and block flammable gases; the magnesium aluminum oxide generated by thermal decomposition and the carbide formed when the polymer material is burned are formed on the surface of the material The protective film of methylpyridine blocks further intrusion of oxygen and also has a flame retardant effect.
2. The solid product after the decomposition of hydrotalcite particles has a large specific surface area and strong alkalinity, which can promptly absorb the acid gas and smoke released during the thermal decomposition of the material and convert it into the corresponding compounds. Thereby playing the role of suppressing and eliminating smoke. Therefore, hydrotalcite is a new type of smoke-eliminating non-toxic halogen-free flame retardant. Its flame retardant performance is significantly better than aluminum hydroxide and magnesium hydroxide, and it has the advantages of both.
3. Hydrotalcite is a non-toxic heat-stable material. It can be used as an efficient, non-toxic and cheap heat stabilizer for polyvinyl chloride. It can effectively absorb HCI produced by the decomposition of PVC during processing and use, and improve PVC processing conditions and heat stabilizers. It can be used as a heat stabilizer together with organotin or lead-zinc, or with other additives to further improve the thermal stability of PVC.
4. Mixing hydrotalcite with other preparations can not only improve the heat resistance of polymer materials, but also improve their other properties. Such as mechanical strength, anti-aging temperature, product surface brightness, insulation performance, antistatic performance, anti-UV performance, etc. Hydrotalcite also has good thermal insulation properties, promotes the absorption of infrared rays by PVC agricultural films, and improves the thermal insulation of home films.
5. Heat stabilizer for PVC, UV absorber in agricultural PE, PVC, and EVA: acid acceptor, stabilizer for organohalogen flame retardant (auxiliary flame retardant): It has excellent thermal stability for PVC and has non-toxic raw materials – high transparency – high dispersion – the salt will not detach at high temperatures of ammonium bicarbonate, so it will not reduce the insulating packaging of PVC.
6. Used as a multifunctional filling improver for flame retardant, stable, insulating, coloring, UV resistant and other polymer materials such as plastics, rubber and chemical fibers.
7. Used as daily chemical raw materials for dyes, coatings, paints, inks, and cosmetics.
8. Used as fabric dyeing wastewater treatment agent, radioactive wastewater treatment agent, and pollution purification flocculant.
9. Used as chemical catalyst carrier and catalyst.
10. Used as improver and intermediate for various materials.
11. Due to its special chemical composition, it has a significant inhibitory effect on the growth of various microorganisms and fungi, so it has bactericidal and anti-mold properties.
Hydrotalcite has many functions and looks like a “universal stone”. Hydrotalcite plays a very important role in chemical production. It can be used as a chemical raw material and can also be used as a catalyst to catalyze autonomous catalytic effects. In the biological field, hydrotalcite can also be used to kill bacteria and inhibit the growth of many microorganisms. Researchers in both the chemical and biological fields are still studying and exploring the functions of hydrotalcite, hoping that more functions of hydrotalcite can be discovered.
